Paper sheet material for boxes.



J. H. GREENSTREET.

PAPER SHEET MATERIAL FOR BOXES. APPLICATION mm was. 1915.

WITNE88ES: m [M708 .7540 Z //z//;//z(4 M JASON H. GBEENSTREET, OF INI sANL-JPOLIS. INDIANA.

PAPER SHEET MAT? RI! Specification of Letters Patent.

Patented Dec. 19, 1916.

Application filed August 9, 1915. Serial No. 44,439.

' Toall whom it may concern:

Be it known that I, Jason H. GREENSTREET, a citizen of the United States, residing at Indiana olis, in the county of Marion and St of Indiana, have invented a new and use jul Paper Sheet Material for Boxes, of whith the following is a specification.

The object of my invention is to produce a cheap but efiicient laminated material, es-

pecially desi ed for packing boxes of the foldable blarfii type.

The accompanying drawings illustrate my invention.

Figure 1 is a sectional diagram of one form of my invention embodying two layers of chipboard or similar material for the interior, and Fig. 2 a similar view showing the arrangement where a single central layer of chi board is used.

n the production of material of the class described, the material should os'sess both the quality of rigidity and'toug ness.

In the constructions shown in Figs. 1 and 2, 13 indicates a layer or layers of chipboard or strawboard reinforced'with cloth 11am faced with jute 12. In Fig. l'the cloth reinforcement 11 is placed Between two layers of chhgboard, while in Fig. 2 a single layer of chipboard is reinforced by two layers of cloth. laid. upon the outer faces of the chipboard. while in Fig. 2 the jute is laid upon the outer faces vof the cloth. The chipboard is In Fig. 1 the jute isrigid but fragile and the cloth adds ma terially to the toughness of the product, While thejute paper furnishes a smooth, tough facingwhich presents a satisfactory finish.

I claim as my invention:

1. A reinforced paperboard comprising an interior filler of chipboard, a reinforcin layer of cloth applied to the chipboard, and facing layers of jute paper.

2. reinforced paperboard comprising an interior filler of chipboard, a reinforcing layer of cloth applied to each face of the chipboard, and facing layers of a toug paper.

In witness whereof, I have her. nto my hand at lndianapolis, Indiana, this ith day of August, A. D. one thousand nine hundred and fifteen.

JASON H. GREENSTREET. 

